Flashing will erase all data. Back up your important files before proceeding.
For the Huawei P10 Lite, there are two primary "proper" ways to update or reinstall firmware: System Recovery (PC Method) on your PC. Connect your P10 Lite via USB. System Recovery huawei p10 lite firmware flash tool link
Find the folder named and copy it (including the UPDATE.APP file inside) to the root directory of your formatted MicroSD card. Power Off: Turn off your Huawei P10 Lite completely. Flashing will erase all data